Cars were timed by police radar as they passed in both directions below a bridge. Their
velocities...

Question

Cars were timed by police radar as they passed in both directions below a bridge. Their
velocities (kilometres per hour, numbers of cars in parentheses) to the east and west were
as follows: 80 E (40), 85 E (62), 90 E (53), 95 E (12), 100 E (2); 80 W (38), 85 W (59),
90 W (50), 95 W (10), 100 W (2). What are (a) the mean velocity, (b) the mean speed, (c)
the root mean square speed?

Robert · Accepted Answer

Cars were timed by police radar as they passed in both directions below a bridge. Their velocities (kilometres 
per hour, numbers of cars in parentheses) to the east and west were as follows: 80 E (40), 85 E (62), 90 E (53), 
95 E (12), 100 E (2); 80 W (38), 85 W (59), 90 W (50), 95 W (10),

Cars were timed by police radar as they passed in both directions below a bridge. Their velocities (kilometres per hour, numbers of cars in parentheses) to the east and west were as follows: 80 E...

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